Finding the equation of a line given 2 points
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Lesson Summary:
In this video, Naomi and Rick explain how to find the equation of a line when given two points. They use the slope formula and point-slope form to derive the equation, making sure to simplify fractions along the way. The final equation is in slope-intercept form, which is ideal for practical use.
Lesson Description:
This video is on finding the equation of a line given 2 points. Both the slope formula and point-slope form are used in the process. Also, there are fractions in this one. :)
Questions answered by this video:
- How do you find the equation of a line given two points using the slope formula?
- What is the slope formula?
- What is the equation for the line through the points (-5, -4) and (-2, -9)?
- What are x1, y1, x2, and y2 in the slope formula?
- How do you find the slope between two points?
- What is point-slope form and how do you use it?
- How can you change an equation from point-slope form into slope-intercept form?
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Staff Review
This lesson is a great introduction to finding slope between two points and then using point-slope form to find the equation of the line between the points. All steps involved with finding slope and plugging the points and the slope into the point-slope equation are shown and explained. -
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